National Museum of Nuclear Science & History
Mary Whidden was a staff worker at Los Alamos during the Manhattan Project.
J. R. Siebert worked for the Comstock-Bryant Electric Company.
Robert J. Moon (1911-1989) was a physicist at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project and a signer of the Szilard petition.
W. H. Sidner worked for the Union Carbide & Carbon Corporation.
